Monofilament for mowing

Abstract

A monofilament for mowing characterized by being produced by spinning a resin composition, said resin composition comprising 70-97 parts by weight of a polylactic acid resin (A) and 30-3 parts by weight of an adipate plasticizer (B), each relative to 100 parts by weight of the sum of the polylactic acid resin (A) and the adipate plasticizer (B). Thus, the monofilament for mowing, which is biodegradable, shows an excellent mowing performance and has a high breakage resistance and high abrasion resistance, is provided.

The invention claimed is: 
     
       1. A monofilament suitable for mowing grass characterized by being made by spinning a resin composition comprising 70 to 97 parts by weight of a polylactic acid resin (A) and 30 to 3 parts by weight of an adipate plasticizer (B) relative to 100 parts by weight of the polylactic acid resin (A) and the adipate plasticizer (B),
 wherein the adipate plasticizer (B) is an ester compound of: 
 adipic acid; 
 an alcohol selected from the group consisting of benzyl alcohol, 1-butanol, octanol and phenethyl alcohol; and 
 an ether alcohol selected from the group consisting of diethylene glycol monomethyl ether, diethylene glycol monoethyl ether and diethylene glycol monobutyl ether. 
 
     
     
       2. The monofilament suitable for mowing grass according to  claim 1 , wherein an abrasion resistance determined by Taber's abrasion resistance test with H-18 abrasive wheel by applying 1,000 g load to rotate by 1,000 times is less than 3%. 
     
     
       3. The monofilament suitable for mowing grass according to  claim 1 , wherein the resin composition further comprises 10 to 400 parts by weight of a biodegradable aromatic-aliphatic polyester resin (C) relative to 100 parts by weight of the polylactic acid resin (A) and the adipate plasticizer (B). 
     
     
       4. The monofilament suitable for mowing grass according to  claim 1 , wherein the resin composition further comprises 0.01 to 3 parts by weight of an antioxidizing agent (D) relative to 100 parts by weight of the polylactic acid resin (A) and the adipate plasticizer (B). 
     
     
       5. The monofilament suitable for mowing grass according to  claim 2 , wherein the resin composition further comprises 10 to 400 parts by weight of a biodegradable aromatic-aliphatic polyester resin (C) relative to 100 parts by weight of the polylactic acid resin (A) and the adipate plasticizer (B). 
     
     
       6. The monofilament suitable for mowing grass according to  claim 2 , wherein the resin composition further comprises 0.01 to 3 parts by weight of an antioxidizing agent (D) relative to 100 parts by weight of the polylactic acid resin (A) and the adipate plasticizer (B). 
     
     
       7. The monofilament suitable for mowing grass according to  claim 3 , wherein the resin composition further comprises 0.01 to 3 parts by weight of an antioxidizing agent (D) relative to 100 parts by weight of the polylactic acid resin (A) and the adipate plasticizer (B). 
     
     
       8. The monofilament suitable for mowing grass according to  claim 1 , wherein the thickness is 0.3 to 3.0 mm in diameter.